Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bdcd2258141af24…

MALICIOUS

PDF

82.2 KB Created: 2021-05-21 06:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6340fa37458ca6629c312731c1a4df17 SHA-1: 9b1c9e6b4c786c3a00b24da12bcc3614012492e4 SHA-256: 1bdcd2258141af240c8084c422d13ab73d571c73d477fc39ec84a20304fff694
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. One prominent URL, 'https://soxebez.ru/strik?utm_term=how+to+setup+dmx+512+controller', is flagged as suspicious and likely leads to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'how to setup dmx 512 controller', aligning with the suspicious URL's parameters. The presence of PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are likely part of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/strik?utm_term=how+to+setup+dmx+512+controller
    • https://cdn-cms.f-static.net/uploads/4417315/normal_5fd7c7af3ed9b.pdf
    • https://cdn-cms.f-static.net/uploads/4408987/normal_602c7db51d95c.pdf
    • https://cdn-cms.f-static.net/uploads/4387589/normal_5fdbc8cfea517.pdf
    • https://cdn-cms.f-static.net/uploads/4426695/normal_6033de824f5db.pdf
    • https://cdn-cms.f-static.net/uploads/4445733/normal_6018160fecae7.pdf
    • https://static.s123-cdn-static.com/uploads/4367960/normal_60017d097dcbf.pdf
    • https://cdn-cms.f-static.net/uploads/4501206/normal_60243ce0240a5.pdf
    • https://zawiwiguxasawum.weebly.com/uploads/1/3/0/7/130739629/vupati-towebezatipolul.pdf
    • https://cdn-cms.f-static.net/uploads/4402711/normal_6035b2c8621bb.pdf
    • https://cdn-cms.f-static.net/uploads/4478415/normal_6017896e92725.pdf
    • https://cdn-cms.f-static.net/uploads/4369768/normal_602be1d1a5768.pdf
    • https://jaluwaxigesife.weebly.com/uploads/1/3/4/6/134640648/4711618.pdf
    • https://zomafada.weebly.com/uploads/1/3/4/7/134772300/kifilozasisekate.pdf
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60219dd60a951.pdf
    • https://pimefukidipobe.weebly.com/uploads/1/3/4/0/134096137/zuwipete.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/16a52007-092d-4bc9-acd6-4bdf359792a2/defiketifexo.pdf
    • https://uploads.strikinglycdn.com/files/690936b6-fc08-4cbb-8b5e-cbabac579063/how_to_practice_dribbling_soccer.pdf
    • https://uploads.strikinglycdn.com/files/ed4e1829-c40a-41c9-b20f-6c470131ab39/nurinanu.pdf
    • https://uploads.strikinglycdn.com/files/7e3cd7f5-64a8-4db0-8ced-8d6c6742a560/what_is_improvisation_as_it_relates_to_music.pdf
    • https://uploads.strikinglycdn.com/files/3b7167e0-4df9-47f9-9f51-800bee8b5c4c/depujinomuwulafajaj.pdf
    • https://uploads.strikinglycdn.com/files/825c9a1b-6597-47cb-9e9c-e42731c21ef0/nowutob.pdf
    • https://uploads.strikinglycdn.com/files/993267b0-e4b2-4ff7-8c0d-458aa4e2a406/addis_ababa_university_electronic_library_thesis.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f95b.bin
74de8da5ac79cb232f30759cca0dbe2966ffb7560ad7732bb8a3f857fe1412ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 5440 bytes
font_01_sfnt_off00010be2.bin
c87382610c014789119d859c8c6d7bad93341e602ac20b95730785db24579bb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE2 10432 bytes
font_02_sfnt_off00012fe5.bin
968c9a2a0e9a62304107f4e9a12a6f32be3dc22b6b9f8d584d0c9b10727bcdbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE5 2788 bytes

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